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pdf 534-500-901-WESCOM 7371 REPEATER Popular

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534-500-901-WESCOM_7371_REPEATER _bc.pdf

pdf 534-900-502-WESCOM 7375 REPEATER Popular

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534-900-502-WESCOM_7375_REPEATER_bc.pdf

pdf 8642-8643-2W-4W-6-Key-Telephone-Set Popular

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8642-8643-2W-4W-6-Key-Telephone-Set_bc.pdf

pdf 8642-8643-Schematics Popular

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8642-8643-Schematics_bc.pdf

pdf Practice 2W 4W Keysets 0975 Popular

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Practice_2W_4W__Keysets_0975_bc.pdf

pdf Wescom 405-101 Combination Pickup Relay Popular

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Wescom 405-101 Combination Pickup Relay.pdf

Wescom 405-101 Combination Pickup Relay
Wescom 405-101 Combination Pickup Relay practice.

This Wescom card shows how to integrate 4-wire sets into key telephone systems.

The 6842 and 6843 telephone sets are normal 565 or 2565 5-line key sets with an added relay. The relay, when activated, moves the handset receiver from the 425 network and connects it to a separate pair. The Wescom 405 card is the interface with the 4-wire circuit. The key telephone works normally with 1A2 KSUs with 2-wire lines. If the button for the 4-wire line is selected the set becomes a 4-wire telephone.

pdf WESCOM 459-101-3 459 FRD Inband Signaling System Popular

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WESCOM_459-101-3_459_FRD_Inband_Signaling_System.pdf

WESCOM 459-101-3 459 FRD Inband Signaling System

[Archived] Contributed by Steve Cichorsky.

pdf WESCOM 459-101-3 459 FRD Inband Signaling System Ocr R Popular

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WESCOM_459-101-3_459_FRD_Inband_Signaling_System_ocr_r.pdf

WESCOM 459-101-3 459 FRD Inband Signaling System Ocr R

Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

pdf Wescom 734-101/3 i2 May75 - 734 Pulse Link Repeater Popular

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Wescom_734-101-3_i2_May75_-_734_Pulse_Link_Repeater.pdf

Wescom 734-101/3 i2 May75 - 734 Pulse Link Repeater

Issue 2, May 1975. Contributed by Dennis Hock.

pdf Wescom 7350-101-3 I2 Jul77 - 7350 Loop to E&M DLL Circuit Popular

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Wescom_7350-101-3_I2_Jul77_7350_to_EM_DLL_Circuit.pdf

Wescom 7350-101-3 I2 Jul77 - 7350 Loop to E&M DLL Circuit

Issue 2, July 1977.  Dial Long Line.  Contributed by John Novack.

pdf Wescom 7360-101-3 I3 Oct73 - 7360 Loop To E&M DLL Circuit Popular

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Wescom_7360-101-3_i3_Oct73_7360_Loop_to_EM_DLL_Circuit.pdf

Wescom 7360-101-3 I3 Oct73 - 7360 Loop To E&M DLL Circuit

Issue 3, October 1973.  Dial Long Line.  Contributed by John Novack.

pdf Wescom DTMF 6 Btn 2W 4W Schematic Popular

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Wescom_DTMF_6_Btn_2W_4W_Schematic_bc.pdf

pdf Wescom Rotary 6 Btn 2W 4W Schematic Popular

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Wescom_Rotary_6_Btn_2W_4W_Schematic_bc.pdf

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Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from Chuck Hensley, John Gilbert, Chuck Batson, Alan David, Steve Flocke, Paul Wills, Dave Gruger, Jim Prather, John Stancliff, Sam Etler, John Novack, Clint Gilliland, Steve Cichorsky and Paul Fassbender.

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